1)  3-dioxolane-2,5'-[4,7]methano[5h]indene],octahydro-, (3'a alpha,4' alpha,7' alpha,7'a alpha)-spiro[ Spiro[1,3-d
(3'Aα,4'α,7'α,7'Aα)-螺[1,3-二氧戊烷-2,5'-[4,7]亚甲基[5H]八氢化茚
2)  NO_3~-
NO~3~-
3)  NO~-_3
NO~-_3
4)  As~(3+)
As~（3+）
5)  3×3×3 lemma
3×3×3引理
1.
This article extends snake lemma to two snakes lermma,and entends 3×3 lemma to 3×n lemma 3×3×3 lemma,Moreover,it studies some problems on exact plane,exact cube as well as problems on cubic commtative diagrams.
(3''Aα,4''α,7''α,7''Aα)-螺[1,3-二氧戊烷-2,5''-[4,7]亚甲基[5H]八氢化茚
6)  3~3Σ_g~+ state
3~3∑_g~+态
参考词条
补充资料：(3'Aα,4'α,7'α,7'Aα)-螺[1,3-二氧戊烷-2,5'-[4,7]亚甲基[5H]八氢化茚
中文名称：(3'Aα,4'α,7'α,7'Aα)-螺[1,3-二氧戊烷-2,5'-[4,7]亚甲基[5H]八氢化茚
英文名称：3-dioxolane-2,5'-[4,7]methano[5H]indene], octahydro-, (3'a.alpha.,4'.alpha.,7'.alpha.,7'a.alphaSpiro[1 spiro[1,3-dioxolane-2,5'-[4,7]methano[5h]indene], octahydro-, (3'a alpha,4' alp 7' alpha,7'a alpha)-h
3-dioxolane-2,5'-[4,7]methano[5h]indene],octahydro-, (3'a alpha,4' alpha,7' alpha,7'a alpha)-spiro[ Spiro[1,3-dioxolane-2,5'-[4,7]methano[5H]indene],octahydro-,(3'a.alpha.,4'.alpha.,7'.alpha.,7'a.alpha.)-
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